A successful endurance athlete would likely have ________________ compared to a sedentary person.
A) a higher percentage of glycolytic fibers
B) a higher percentage of type I fibers
C) a higher percentage of fast-twitch fibers
D) the same percentage of slow-twitch and fast-twitch fibers

Question

Quizplus · Accepted Answer

Endurance athletes rely on their slow-twitch (type I) muscle fibers for prolonged, low-intensity exercise. These fibers are more efficient at utilizing oxygen and producing energy through aerobic metabolism. Thus, endurance athletes would likely have a higher percentage of type I fibers compared to sedentary individuals who mostly rely on their fast-twitch (type II) fibers for short bursts of activity.

A Successful Endurance Athlete Would Likely Have ________________ Compared to a Sedentary